Piston-rod packing.



PATENTED MAY 22, 1906.

J. H. HOYBR.

PISTON ROD PACKING.

APPLICATIQN FILED DBG.22.1905.

@Worn/QW.

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UNITED STATES 'PATENT OFFICE.

JOHN: H1. HOYEIRY- GF: CORLISS, WISCONSIN..

PISIGN-ROD PACKING."

Specification' of Letters Patent.

lfatentea- May 22,' 1906;

Application filed December 22, 1905.' Serial No. 292.905.

.To all whom, tn/ay concern: n

Beit known that'I, JOHN H; Home, a citizenv of the United Statesand a resident! of- Crlissin the county` of Racine and St'at'eofl Wisconsin, have inventedI certain new and useful Im rovements in Piston-Rodlacking andIfdoiiereby declare that the followin 1s a full, clear, and exact description thereo y The invention consists in certain peculiarities of construction and combination of parts hereinafter' particularly set forth with reference to the accompanying drawings and subsequently claimed, its object being to provide simple, economical, steam-tight packing for piston-rods.

Figure A1 of the drawings represents a 'partly-sectional view, indicated by line 1 1 in Fig. 2, and it illustrates the application of a packing in accordance with my invention; and Fig. 2, a similar view indicated by line 1 1 of Fig. 1.

Referring by letter to the drawings, A indicates a piston-rod, and B C the sections of a separab e bonnet attachable to the head of a steam-cylinder and lwhich contains my improved packing for the piston rod. The packing 1s preferably multiple in the bonnet, two packings to a set, as herein shown, the sections of said bonnet being recessed to form annular chambers containing the packings.

Each packing comprises 'an outer ring divided into segments D, between the meeting ends ofwhich space is provided to compensate for the Wear of said se ments and the piston-rod. The segments o the outer pack- 'n -ring are each provided with a right-angle 1de recess for the engagement of a segment Ev of an inner packing-ring, and the several segments of sald outerpacking-ring are peripherally grooved for the engagement of an annular'spiral s ring F under tension, the ends of Ibeing hooked together. The segments E of the inner packing-ring are arranged to break joints with the segments D of the outer packing-ring, and in the assembly of both rings one with the other the proper positions of the segments of said inner ring are determined by stop-pins b, projecting from the segments of saidl outer ring or .each pin may be a dowel of one segment engaging a corresponding recess of another segment.

The segments E of the inner packing-ring have ground-j oint fit of side and periphery in the segments D of the outer pac -ng-ring to insure of their steam-tight engagement, and by having one packing-ring Within aneth Athe-'two rings occupy butV one-halfthe space It is preferable to employ two pairs of intermatching packing-rings in one space in the bonnet aforesaid, and they may be' so arranged that the several segments of one pair of the rings oppose those of the other pair, preferably inground-joint contact, or the arrangementlmay be such that only the seg.- ments of the outer rings are opposed in preferably ground-joint contact, both arrangements being shown in Fig. 2.

It is also evident that the segments of the several outer packing-rings may be arranged to have the recesses of all their segments and the inner packing-ring segments therewith face sidewise in the saine direction, or the arrangement may be such that the recessed sides of a pair of the outer packing-rings and the segments of the inner packing-rings therewith face sidewise inthe same direction opposite that of the recessed sides of the segments of the other pair of outer packingrings and those of the inner packing-rings therewith.

From the foregoing it will be understood that I provide a reversible metallic packing suitable for both non-condensing and condensing steam-engines, this important feature of my invention being due to the right-angular recessing of the segments of the outer packing-rings on one side only. For noncondensing engines it will be preferable to arrange the packing so that the recessed sides of the segments of the outer rings of same and the segments of the inner packing-rings therewith all face outward sidewise thereof. For a condensing-engine it will be preferable in practice to arrange the packing so that the recesses of the segments of one pair of the outer packing-rings and the segments of the inner packing-rings therewith face outward sidewise thereof, while the recesses of the outer packing-rings of the other pair and the segments of the inner packing-rings therewith face sidewise in a irection contrary to that aforesaid.

' I claim- 1. A piston-rod packing comprising an outer ring divided into segments each having one side only thereof provided with a rightangle recess, an inner ring divided into segments tting the recesses of the outer-ring- IOO IIO

segments with which they break joints and l have their sides and peripheries in groundjoint contact, and an annular spring under tension `on the segments of said outer ring.

2. A piston-rod packing comprising an outer ring divided into segments each having one side only thereof provided with a rightangle recess, an inner ring divided into segments fitting the segments aforesaid with which they break joints and have their sides and peripheries in ground -joint contact, means for determining the proper position of the inner ring-segments, and an annular spring under tension on the segments of said outer ring.

3. A piston-rod packing comprising an outer ring divided into segments each having one side only thereof provided with a rightangle recess, an inner'ring divided into segments fitting the segments aforesaid with which they break joints and have their sides and peripheries in ground -joint contact,

stop-pins projecting from the outer ring-segments between ends of the inner ring-segments, and an annular spring under tension on the segments of said outer ring.

4. A piston-rod packing comprising d iplicate outer rings each divided into segments having one side only thereof provided with a right-angle recess, duplicate inner rings divided into segments fitting the recesses of the outer rings with which they break joints and have their sides and peripheries in groundjoint contact, the opposing surfaces of the duplicate parts in the packing being in similar contact, and annular springs under tension on the segments of the aforesaid outer rings.

In testimony that I claim, the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

JOHN H. HOYER.

Witnesses N. E. OLIPHANT, GEORGE FELBER. 

